Tonguing-and-grooving machine.



No. 698,705. Patented Apr. 29, I902.

H. A. HOLT. TONGUING AND GRUOVING MACHINE.

(Application filed Nov. 1, 1901.) (No Model.) 7 "5 sheets-sheet I.

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Patented Apr. 29, I902. H. A. HOLT.

TONGUING AND GROOVING MACHINE.

(Appliqgtion filed Nov. 1, 1901.)

5 Sheets-Sheat 2.

(No Model.)

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Witnesses: 9.16

m: NORRIS PETERS co. moTouwo. WASHNGTDN. u, c

No. 698,705. Patented Apr. 29, I902.

H. A. HOLT.

TONGUING AND GROOVING MACHINE.

(Application filed Nov. 1, 19 01.)

5 Sheets8heet 3.

(No Model.)

m: mmns PETERS co. vuoroumau WASHINGTON. b. c.

No. 698,705. Patented Apr. 29, I902.

H. A. HOLT.

TONGUING AND GBOOVING MACHINE.

(Application filed Nov. 1, 1901.) (No Model.) 5 Sheets-Sheet 4.

No. 698,705. Patented Apr. 29, I902. H. A. HOLT. TONGUING AND GBOOVINGMACHINE.

(Application filed Nov. 1, 1901.)

5 Sheets-Sheet 5.

3 I lll vrill I I I l l llll (No Model.)

Inven ior: M A

UNITED STATES PMENT Cri ics.

HENRY A. HOLT, OF WILTON, NEW HAMPSHIRE.

TONGUINGV-AND-GROOVING MACHINE.

SPECIFICATION forming part of Letters Iatent N0. 698,705, dated April29, 1902.

Application filed November 1, 1901- Serial No. 80,760. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY A; HOLT, of Wilton, in the county of HillsboroandState of New Hampshire, have invented certain new and usefulImprovements in Tonguing-and- Grooving Machines, of which the followingis a specification.

This invention relates to machines fortonguing and grooving the edges ofboards; and it has for its chief object to enable the tongues andgrooves to be formed in exact parallelism with the sides of the board,whether said sides are fiat or warped and without applyingstraightening-pressure to the board in case its sides are warped.

The invention also has for its object to p'ro-- vide certain improvedmeans for beadingthe upper surface of the board.

The invention consists in the improvements ing-frame being broken away.Fig. 4 represents a side elevation showing parts of- Fig.

3. Figs. 5 and 6 are elevations of the tonguing cutter-head and itssupporting and adjusting mechanism. Fig. 7 represents a side elevationof a portion of Fig. 3 on a larger scale.

The same reference characters indicate the same parts in all thefigures.

In the drawings, 3 representsthe bed or ta ble of the machine, having aguiding-rib 4, against which one edge of the board 5 bears during theoperation.

6 represents the tonguing cutter-head, having tongue-forming cutters 7and arranged to present said cutters to the edge of the board, whichbears against the guide 4. The cutterhead 6 is affixed to a verticalshaft 8, which is journaled in bearings 9 9. Said bearings are affixedto a bar 10, having ears 12 13, Fig. 5, which are movable vertically onfixed vertical studs 14 15 on the frame of the machine, the shaft 8 andcutter-head 6 being thus rend ered vertically movable.

With the bar is connected a rider, consisting of rolls 16 16, a holder17, in which said rolls are j ournaled an arm 18, affixed to the holder,a vertical stud 19, affixed to the arm l8 and extendingthrough thetable, and

an arm 20, affixed to the stud 19 and to the bar 10. The rolls 16 bearon the upper surface of the board, and through the intermediate partsconnectingthem with the bar 10 hold said bar and thecutt'er-head at aheight determined by, the upper surface of the board. The bar 10 isadapted to swing hOIlZOiltflllY on the studs 14 to adjust thecutter-head horizontally and is held at the desired adj ustment by meansof an eccentric 21, Figs. 1 and 6, affixed to a vertical stud 22, whichis journaled in a fixed step or hearing 23 on the frame, and a strap orsocket 24, embracing the eccentric and rigidly connected by an arm 25with ,thebar 10. The eccentric 21 has a handle 26, by which it may beturned to impart the desired horizontal adjustment to the cuttor-head6,"the eccentric and strap holding the cutter-head at any position-towhich it may be adjusted: j i

27 represents a cutter-head having grooved cutters '28 and affixed to ashaft 29, which is journaled in bearings 30 30, affixed 'to the swingingend of a frame 31, the other end of 'which has cars 32 32, Fig. '3,mounted to turn on bearings 320, surrounding a vertical shaft 33, thegrooving cutter-head being thus adapted to swing horizontally to anyextent required to'adaptit to the width of the board being treated.

The shaft 29 is vertically movable in its bearings 30 to permit theheight of the grooving cutter-head to be varied. The lower end of saidshaft rests on a step 34, supported by an arm 35, affixed to a verticalstud 36, which is adapted to slide vertically in guides 37 on theswinging frame 31. To the upper end of the stud 36 is affixed an arm 38,having at its outer end a holder 39, in which are journaled rider-rolls4O 40, arranged tobear on the upper side of the board near the edgeacted on by the cutters 28. The height of the cutterhead 27 is thereforedetermined by the upper surface of the board.

41 represents a finger connected by an arm 411 with an arm 412, aflixedto the swinging end of the frame 31. The finger 41 projects over thetable 3 and is obliquely arranged and located in position to beencountered by approach to the guide 4, the distance between thecutter-head and guide being less than the width of the narrowest boardto be treated. One corner of the advancing end of the board striking theoblique finger 41 forces the cutter-head 27 away from the guide adistance determined by the width of the board, the grooving cutter-headbeing thus automatically adjusted to the width of the board. Theswinging end of the frame 31 is supported by a segmental track 43,affixed to the supporting-frame, the swinging frame having a roller 44,supported by the arm 412 and bearing on said track.

The cutter-heads are rotated by belts 45 46, running on pulleys affixedto the shaft 33 to pulleys on the shafts 8 and 29, carrying saidcutter-heads.

Suitable antifriction-rolls 47 47 and 48 are arranged to projectslightly above the upper surface of the table and support the under sideof the board. The rolls 47 47 are journaled in a holder 49, connected byan arm 50 with the swinging frame 31. The roll 48 is journaled in aholder 51, affixed to the table.

52 53 represent beading-cutters adapted to form beads on the uppersurface of the board. Said cutters are affixed to horizontal shafts 5455, which are journaled in bearings on the swinging ends of frames 5657, whose inner ends are mounted to swing on a horizontal pivot-rod 58,the cutters being thus rendered vertically adjustable. The said framesare provided with shoes 59, which bear on the upper side of the boardand determine the depth of out of the beading-cutters. The cutters arerotated by belts 60, running on pulleys on a shaft 61 and on pulleys onthe cutter-shafts 54 55.

The beading-cutter 52 is held in close proximity to the guide 4, so thatit makes a head in the board close to its tongued edge, the frame 56being confined against lateral in ovoment on the pivot-rod 58 by fixedcollars 62 62. The frame 57 is movable laterally on said rod to adjustthe cutter 53 toward or from the cutter 52. The cutter 53 is caused toform its bead at the center of the width of the board, whatever thewidth may be, by a proportioning-lever 63, which is pivoted at 64 to aholder 65, which is connected by a vertical pivot 66 with a fixedsupport 67, the pivot 66 being in line with the guide 4. The

swinging end of the lever 63 has an offset oblique finger 68, the innerend 69 of which forms a shoulder which bears against one edge of theboard and is held there bya weight 70, suspended by a cord 71, which. isaffixed to the latera1ly-movable frame 57. The lever 63 is engaged withthe frame 57 by a pin 72 on said frame and a slot 73 in the leverreceiving the pin. The pin 72 is located half-way between the shoulder69 and the pivoted inner end of the lever. When the end of the advancingboard reaches the oblique finger 68, it swings the lever 63 awayfrom theguide 4 until the 'outer edge 'of the board bears against the shoulder69. It will be seen,therefore, that the lateral movement imparted to theshoulder of the proportioning-lever by the entrance of the board betweenit'and the guide 4 is twice that imparted by the lever to the frame57-and cutter 53. Hence the said cutter is always held in a uniformrelation to both edges of the board whatever the width of the board maybe.

75 represents an edge gage having a shank '74, Figs. 2 and 7, which issecured by bolts 76 to the arm 38. Said gage is formed to bear on theouter edge of the board and limit the depth of entrance of thegrooving-cutters into the board. The gage is'preferably adjustable topermit the depth of the groove to be adjusted.

77 represents a slot in the gage 75, and 78 a stud affixed to the arm411 and projecting upwardly into the slot to prevent the gage 75 and thearm 38 from swinging horizontally on the stud 36.

It will be seen that control of the height of the cutter-heads 6 and 27by the upper surface of the board enables-the tongues and grooves tofollow any curvature in the said surface caused by warping,so that thetongues and grooves are made exactly parallel with the sides of theboard regardless of any warp or twist therein.

The means described for laterally adjusting and holding the tonguingcutter-head 6 are intended chiefly to enable the said outter-head to bedisplaced, so that it will not act on the board when it is desired togroove and not tongue the board. When the tonguing-cutter is thusdisplaced, the beading-cutters may also be displaced, so that they willnot act on the board.

80, Fig. 5, and 81, Fig. 7, are springs which yieldingl'y support thecutter-heads 6 and 27 when there is no board under the riders.

My invention is not limited to the details of mechanism here shown, andthe same may be variously modified without departing from the spirit ofmy invention.

Having thus explained the nature of my invention and described a way ofconstructing and using the same, although without having attempted toset forth all the forms in which it may be embodied or all the modes ofits use, I declare that what I claim is 1,. In a machine of thecharacter specified, a work-supporting table, a cutter -head, a shafttherefor, a vertically-movable support for said shaft and cutter-head,whereby the cutter-head may be adjusted vertically, and a riderconnected with the shaft-support and arranged to be supported by theupper surface of a board on said table, whereby the height of thecutter-head is determined by the upper surface of the board.

2. In a machine of the character specified, a work-supporting tablehaving a fixed edge guide, a swinging frame pivoted below the table, acutter-head having a shaft journaled in bearings on the swinging end ofthe frame and movable toward and from the said guide, said shaft beingvertically movable, a rider arranged to bear on the top surface of aboard, and connections between the rider and shaft, whereby the heightof the cutterhead is determined by the upper surface of the board.

3. A machine of the character specified, comprising a work-supportingtable having a fixed edge guide, two cutter-heads, ahorizontally-movable support for the bearings of one cut-terheadyieldingly pressed toward said guide, vertically-movable supports fortheshafts of the two cutter-heads, riders arranged to bear on the topsurface of a board, and connections between said riders and theshaft-supports, whereby the height of the cutter-heads is determined bythe upper surface of the board.

4. A machine of the character specified,

comprising a work-supporting table having a fixed edge guide, avertically-movable beadin g-cutter held against lateral movement andlocated over said table, a vertically and horizontally movable cutterlocated over the table and movable toward and from the guide, and aproportional adjusting device actuated by the width of a board to adjustthe horizontally-movable cutter.

5. A machine of the character specified, comprising a work-supportingtable having a fixed edge guide, two pivoted frames located over thetable and movable toward and from the same, one frame being horizontallymovable and the other confined against horizontal movement, aproportional adjustinglever pivoted at one end to the table and havingat the other end a board-engaging shoulder, the lever being engaged atan intermediate point with the horizontally-movable frame.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

HENRY A. HOLT.

WVitnesses:

GEO. L. CADY, J12,- CHAS. G. MARTIN,

